Telescopic sprinkler



Aug. 19, 1952 S. E.4 LIPPERT TELESCOPIC SPRINKLER Filed Feb. 10, 1950 Patente-d Aug. `19, 1952 l I Y 1 c This" invention relatesto 'telescopic sprinklers, and has forv one of its' objectsthe; production of a simple and efcientmeans for adjustablycontrolling the direction and volume of iiow of water out through the outerend of the sprinkler. Y Y A further object of this invention is the production of a telescopic sprinklerhwhich is ksimple in construction,- eicient in operation and comprises a minimum number of lparts. i

Other objects and advantages of the present invention will appear throughout the following specification and claim.

In the drawing- A Figure 1 is a top plan view of thesprinkler; Figure 2 is a vertical sectional view cf the sprinkler in an extended position taken on line `2-2 of Figure 1, certain parts being shown'in elevation; y l l VFigure 3 is a vertical sectional View of the sprinkler in a retracted position;

Figure 4 isahorizontal' sectional view taken on line 4 4 of Figure 3; V

Figure 5 is a vertical sectional .View illustrating a modified rform' of the invention; and

Figure 6 is a horizontal sectional view taken on line 6-5 of Figure 5.

Byreferring to the drawing, it will be noted that I0 designates the outer pipe casing which is connected to a water supply elbow Il, which elbow in turn is connected to the water supply main or means I2. A swedge I3 is formed upon the upper end of the pipe casing I0. This swedge I3 is preferably countersunk under the surface of the ground in the manner as shown in Figures 2 and 3, and is provided |with a dome-like upper face to shed water laterally away from the junction of the outer pipe I0 and the extension tube I5 described as follows.

An extension tube I5 of smaller diameter than the pipe casing I0 is slidably mounted through the swedge I3 in the manner shown in Figures 2 and 3, and this tube I5 carries a guide I6 at its lower end which normally rests upon a supporting shoulder I1 at the bottom of the pipe I0 when the tube I5 is in a retracted position. The tube l5 is provided with a slightly outwardly ared valve seat I8 at its upper end, as shown in Figures 2 and 3.

A sprinkler-head supporting nut or member I9 rality of longitudinally Vextending water passages 2 I ,preferably three in number.- A sprinklerhead V2.2. is `carried by the nut ormemben I9iand this head 2-2 is` in the-form 'offan'inve'rted cone having av depending threaded stem 23v which is adjustably threaded through "alcertrai threaded aperture' 24 formed inthe sprinkler-head supporting `member or nut I5.` The sprinkler-head 22, which as stated above is inthe natureof an' inverted cone, is

provided with a'bev'eld under face25,' and the edge of the head'22 overhangs the valve seat I8, as showny inFigures 2l.and13v..The,.head V22 is Yof greater ydiameter Vthan vthe valve "seat and overhangs the junction of tlfielin'neA tube Iland the outer pipe Ill to' 'shield the 'slidable connection of these elements from particles of earth or' other foreign particles which might preventtheV reci-procation of thetube I5jwithinptlre pipeA IIL* By rotating the sprinkler-headjz" in the desired 'direction;Y this headl may be adjusted toward or away from the seat I8 to control the volume and natureoi-the spray of water discharged from the sprinkler. l Y

As shown in Figure `3, theextension tube l5 normally remains in a retracted position until lthe water is turned on and under the pressure of the water entering the pipe casing I0 and tube I5, the tube I5 will be extended to the position shown in Figure 2 until the guide abuts against the under face of the swedge I3, as shown. As soon as the pressure of the water is reduced suinciently or turned off the tube l5 will automatically return to its normal position. The type of structure illustrated in Figures l to 4 inclusive, is preferably used in locations where it is desired to extend a spray of water in all directionsaround a central axis.

It should be noted that the flared valve seat IB will constitute a stop to limit the retraction of the tube I5 into the casing IB and when the head 22 rests upon the seat I8 the head 22 will overhang the valve seat and the junction of the tube and casing in spaced relation to the upper end of the casing I0 to prevent the head 22 from corroding and from becoming stuck upon the casing I0 when the tube I5 is retracted.

In the form shown in Figures 5 and 6,'there is provided a special type of structure which is adapted to be used near the edge of a lawn or adjacent a walk-way wherein it is desired to directonally control the spray. and cause water to be sprayed only in one direction, as for instance toward one side away from the Walk-away and the like. In the form shown in Figures 5 and 6. there is yprovided a pipe casingvZG similar to the supporting member or nut 34 similar to the mem.,- ber or nut i9, the head 33 being adjustabli?Y l When the head- 33' is4 adthrough the nut 35.

justed in the position shown in Figureb, it will.

be seen that the head 33 contacts the ,high portion 3l and is spaced from ythe low portion 32 at the end of the tube 30, thereby causing water vto be discharged outwardlypin a crescent-like spray in the direction as indicated by the arrows,v the spray having agre'ater volume at. its centerjand gradually diminishing laterally toward the ends of the sprayl'and thereby'providing adirectional spray with the greater Volume. at a selected` point;

The'inclinedend' of ,the tube 3U also prevents cloeginsof the open end; ofthe, tube and the pressurei oi water will'- tend t flush any accumulated substance, outwardly and' downwardly away fro-m the inclined 'opcnouter endioithe tube' assoon as 'waterpasses throueghjthetube.

Certain 'detail' changes the construction may be employed'without departing from the spirit of. the inyentiongjso long as such changes fall withinthe. scope'r ofi: the appended claim.

Having, idlescribed .the 'i'nventiom what is claimed asnewisj: g Y

YA telescopic sprnmerpfg .the class, described comprising .a pipe casing adaptedito beconnected to a water: supplyand countersunk under; the surface of the.A glound. in which the sprinkler is embedded,v saidfca-siner` having a dome-like upper end adapted to terminate below the surface of the ground; and because ofv its dome-likeY formation shed water laterally toward the side of the pipe casing; said dome-like upper end of said casing having an aperture, an extension tube of smaller diameter than said pipe slidably mounted through said aperture within the casing and adapted to retract into said casing, said extension Itube having an outwardly flared valve seat defining a Water discharge opening at its upper end', said valveseat overhaneiner;the;` junction of the pipe casing and extension tube and constituting a stop to support the valve seat above the .pipe casing when the extension tube is in a retractedV position, a sprinkler-head supporting member tted within the outer end of said extension tube, an inwardly pressed bead locking said supporting member in said tube, an inverted cone-shaped sprinkler head, a stem securing said head-,gto said supporting member, said sprinkler head being of a larger; diameter .than said seat andofj'a larger diameter ,than said tube and overhangi-ng said. seat and overhanging the junction ofsaidextension tube. and saidocasing and being inv spaced relation to said casing. and out of contact with-the casing when the extension tube is in a retracted 'position to lshield the junction of thetube and casing and toeprevent the sprinkler head from becoming corrodedfandstuck upon the casing when retracted. STROHM E., LIPPERT.

REFERENCES. CITED' The following references arel of record.I in the file of this patent: ,t Y

' f UNrrEDesrA-ss PATENTS `CircatjBritain ,A Feb. 2.6, 1931 

